Cabl l



Aug. 25, "i925,

C. L. RPEN ELECTRIC FURNACE Filed sept.; I. 1921 Ivenbor' Caf! Llp-Seru)b9 IS Antornevcj Patented' Aug. 25, 1925. i y Lgg UNTD STT FQ CARL L.TEPSEN, OF SCHENETADY, NEW 'YRK, ASSIQNR GENERAL ELECTRIC CGMPANY, ACOREMTXH F NEW YRI.

inerme.' mimmo Application filed Septemzer im?, 1923i. ferial No.fiiiil/'o fi/Z ae/mm if may concern: caiteil, to seein-ely anchor thelayer of prolle it known that' l. Cini. L. lesen, ieetii'e nurteriiil l5upon `the surfaee. eii'izcn ol' the l'niteil Stuten', residing ut iuyerlli o', rurioruiuluni liriel u on the Scheneetzuiy. in the eounty ofSehenertiitiy, oase of the lower eleetrorlee' constitutes a Starte ofNew York, have invented Certain hearth upon which n charge 17 of moltenG new unil uaeful improvements in Electric brziss or the like may bemaintained. The liuriuiees, of which the following is o speeiinorzihleelectrodes l0, il are of smaller liculion. diameter tlui'n thecooperating stationery '.lhe present invention comprises imiinelectrorles so that when the upper electrodes proveiuent inelectr-i(- furnaces of the are are in zxreing: relation to theiowerelectroes 65 type. lVhcn the are is used as u source of ille ureingtipe: of the upper electrodes may lieiit for metallurgical operationsenrrieil be surrounded by Aa layer 18 of granular out nuiterinlly belowure temperatures, such carbon. 'lhe upper aireing end of the lower nen1-us5 melting, it is necessary to uioiierziilel electrodes preferablyis mode Somewhat 1 the heating" iniensity by Shielding the chargeliolloweil or die-heil. The furnace may be' 70 from the directrailiution of the ure. provided with any iiesired number of eleclnuecordanee with my present invention, trodes, nltlio two only have beenindicated, l hure proi'iileil :in improved fui-nere in und operate withsinlrle or polypheise ourn'hich the ehurge is protected by ii Shieliirent Supply. For example, when time fur- 20 which :it the Feine timeuroteets the4 hearth nare shown ie operated 'with n singleplmse 'I5electrode iuijiu'ent the ciuirge 'from oxiilupower supply, suitableConnections are made tion unil thus prolonge the life of the furto theeeetroiles l0, ll, and 'the current nece. posees from one of the upperelectrodes to The zwcmnpunying;l drawing comprises in. theeorreepoiKlingr iower electrode through f Fig. l a front eleriition,partly in section, the eoniiueting loiise to "the other lower elec- Siioi u furnuee embodying` my invention; Fig. troile. troni thence to the Jer upper elec :i heiner u cross-section on u smaller Seule. iroile.

ol the. lower cleetroile und part of the uil# By my improvedconstrueilion space is ljoining will. econoiinzed unil :in nnprofedthermal elli` im Referring to the drawing, the l'urnure eiency issecured es Compared with former 85 container eouiprises u housing il ot'sheet eonbtrueiious utilizinr e, Sei'iarute baille, Wall irou lineilwith ehupeil unil titled bloeks /L between the electrodes unil thecharge. The of reiructory iiuiteriul. the inner layer i5 sluip'e .inilloeution of the electrodes together' preferably consistingofmrhorunihunbrick.- with the coatingF 1:3 upon the lower eleclhe rnulteil root iconsiste of :i goed gfriuie troiics shielihi the rlnirfe li' from directheat 90 oi' lire brick. uhove which ie u layer' of roue ruiiiution ofthe are el ut the 'same time minut-eil heut insulating uniteriul :3.which the. lower eleetrorles i protected from oxinniy he oniitteil.Resting on u .'f'inilueiing (lation, Hem ie, renvoyer! by dief-Ci;.e011- liase G oi' the furnziee :iro stationary elec duction 'from thelower eleetrodes to the -l0 troeles, only one of which, nuniiiereil 7,'is charge.. 95' shown. Both the base 6 unil the electrodes lil/Vinit lclaim iis new :ind desire to secure consist of carbon or graphite. Aneleetroclo by Letters atent of the United States, is

) posses through the. bottoni of the lurnuee l. ein electric lurniicecomprising at corl'or connection to u Suitable outonuitie. eonbouaeeouselectrode lnwingfu coating o heattrol apparatus.l Movable ure electrodesli), conducting oxidation reeisting Vrnaiterial, a 1GO H ,puss throughrefractory sleeves l2, l', second electrode of :snuiller diameter inconeistingj of n emiiorunduni composition operativo eroine; relationthereto, and con in the root` of the i'urnziee incl eontiirt withtuineilSurrounding i space about the rrrcing the eorreeponiiing lowereleeroriee. tipe of the eieetroiies, Suid container 5i? ln order topreserve the lower' eleetroiieri ingjr i hearth Minicom seid Corrierielectroiie. X05 from deteriorating inliuei'iees they are 2. in ele' lefurlieize comprising ai con emite@ with lamiere of un oxiilzitionresistminer, un e .trooie loeuteel on the buse oi' ingr imiteriiiisiieii :is cirrhoruinluui Acement. Suid oontiii i imi/inf: o. heatingepilee sich -iire'eiziii-lr @grooves Li iii-e pro'rulcil in *rhojiieeut, soul. @inet-rode neun? provided with is. i5 .surta-ice. ot thelower eieetroiies, us izulisnruoe loyer oi' i'.\:i,teoiif* Ii-etuioicuhiizion 7:10

